How to get local axis orientation in Python?
As Codemax answered. Thanks to him. Here is an example how i can rotate Localy an active object at Y-Axis.

activeObj = bpy.context.scene.objects.active
activeObjMatrix = activeObj.matrix_world
theAxis = (activeObjMatrix[0][1], activeObjMatrix[1][1], activeObjMatrix[2][1])
bpy.ops.transform.rotate(value=rotateValue, axis=theAxis)